Im stuck on an assignment i need help simplifying this 6n+5(10n−7)

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Solve for x and select the correct answer

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25